Caracterização do potencial de degradação de um isolado bacteriano oriundo da região Amazônica

Abstract

Bioremediation is the use of microorganisms capable of metabolizing contaminants and converts them into less toxic products. In previous studies, we performed bacteria isolation from contaminated area for oil waste in Amazon. Despite its oil degradation potential, the application of bacteria in contaminated sites may interfere with their ecological balance. This study aimed to promote studies of gene characterization and hydrocarbon degradation potential with a selected bacterial strain and identify and define the proteins involved in degradation process. To achieve this objectives degraded substances have been identified by gas chromatography and proteins involved by proteomics; Genome analysis allowed characterization of genes related to xenobiotics degradation. The strain was identified as Pseudomonas putida S16. 51 substances were detected by gas chromatography, of these, 23 were completely degraded, including PAH containing naphthalene (100%), anthracene (11.49%) and phenanthrene (7.41%). We identified 89 genes related to xenobiotic degradation in P. putida S16 AM genome, genes capable of degrading naphthalene, anthracene and phenanthrene (nah, phn, fdx, catA), cytochrome production and chemotaxis. In proteome analysis, proteins were expressed oxidation-reduction, metabolic processes, polyamines, aldehyde dehydrogenase, carbon storage, chemotaxis and amino acid synthesis. 355 proteins were identified with redundancy expressed during 7h contact to P. putida S16 AM (I4) with petroleum, and 268 during 75h contact; For glycerol, 467 were identified in 7h interaction, and 228 in 75h contact. The presence of proteins related to metabolism and oxidationreduction when the strain under study was in contact to the petroleum suggest the use of this as a carbon source for bacterial metabolism. These studies are important because of identification of genes and proteins with potential to become practical application of biotechnology products.